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Physical specifications
Table C-1 Physical specifications
Product Height Depth Width Weight
HP Officejet Pro X451
Series
380 mm (15.0 inches) 399 mm (15.7 inches) 513 mm (20.2 inches) With supplies: 23.7 kg
(50.0 lb)
Without supplies: 16.7
kg (16.8 lb)
HP Officejet Pro X551
Series
414 mm (16.3 inches) 399 mm (15.7 inches) 513 mm (20.2 inches) With supplies: 23.7 kg
(50.0 lb)
Without supplies: 16.7
kg (16.8 lb)
Power consumption, electrical specifications, and
acoustic emissions
CAUTION: Power requirements are based on the country/region where the product is sold. Do not
convert operating voltages. This will damage the product and any such damage is not covered under
the HP limited warranty and service agreements.
Acoustic emissions
Table C-2 Acoustic emission levels
Operation LwAd-mono (B) LwAd-color (B) Notes
Print 6.9 6.8
Copy 7.1 6.9 ADF models
Scan 6.9 6.7 ADF models
HP recommends that the machine be located in a room in which no employee has his/her regular work
station.
192 Appendix C Product specifications ENWW